What is the value of relative magnetic permeability of perfectly diamagnetic substance ?

Explanation

To determine the value of the relative magnetic permeability of a perfectly diamagnetic substance, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Magnetic Permeability**:
- Magnetic permeability is a measure of how much a material can become magnetized in an applied magnetic field. It is denoted by the symbol \( \mu \).

2. **Define Relative Magnetic Permeability**:
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